- _player_a->Video.connect (bind (&Combiner::process_video, _combiner, _1, _2, _3, _4));
- _player_b->Video.connect (bind (&Combiner::process_video_b, _combiner, _1, _2, _3, _4));
+ _player_a->Video.connect (bind (&Combiner::process_video, _combiner, _1, _2, _3));
+ _player_b->Video.connect (bind (&Combiner::process_video_b, _combiner, _1, _2, _3));